package mapper;

//操作数据库的Mapper接口

import org.apache.ibatis.annotations.*;
import pojo.Brand;

import java.util.List;

public interface BrandMapper {
    //查询所有品牌(基本)
    @ResultMap("brandResultMap")
    @Select("select * from t_brand")
    List<Brand> selectAll();

    //单个查询
    @ResultMap("brandResultMap")
    @Select("select * from t_brand where id = #{id}")
    Brand selectById(int id);


    //插入一个品牌
    @Insert("insert into t_brand values" + "(null,#{brandName},#{companyName},#{ordered},#{description},#{status})")
    void add(Brand brand);

    //修改一个品牌
    @Update("update t_brand set brand_name=#{brandName},company_name=#{companyName},ordered=#{ordered},description=#{description},status=#{status} where id=#{id}"
    )
    void update(Brand brand);

    //删除一个品牌
  @Delete("delete from t_brand where id=#{id}")
  void deleteById(int id);

  //以下是分页查询
    //1.查询某一页
    @ResultMap("brandResultMap")
    @Select("SELECT * FROM t_brand LIMIT #{beginIndex},#{pageSize}")
    List<Brand> selectAllPage(@Param("beginIndex") int beginIndex ,
                              @Param("pageSize") int pageSize);

    //2.查询总的数据条数
    @Select("SELECT count(1) FROM t_brand")
    int selectCount();

}
